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 Post subject: Wet Sanding Procedure
PostPosted: Thu Oct 24, 2019 1:42 pm 
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Joined: Tue Mar 12, 2013 9:55 am
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At long last I am finally done with the lacquer and am turning my attention to finalizing the finish. The next step is wet sanding the guitar. I am using the Stewart MacDonald kit so I have the correct sandpaper but I am not exactly clear on how to proceed. Can I go through the various grits in one sitting or do I have to let it dry in between grits and how much time should I wait before moving on to the finer grits?

As always I appreciate all the information available on the site.

Regards,
Pat


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PostPosted: Thu Oct 24, 2019 5:51 pm 
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There are different ways of doing it. This is how I do it. I fill a container with about 3-4 cups of water, and add one to two drops of dish detergent (for lubrication). Start with the lowest grit (roughest paper), and put it into the water. Allow it to soak for a few minutes.

Always sand with a something firm under the paper, never your hand. You can use a block of wood, a sanding block, pretty much anything that will evenly apply the paper. I use one of those sanding sponges from Home Depot, cut to size. Sand until your lacquer is level. Wet the paper as needed, to keep it lubricated.

At this point you will want to switch papers to the next grit. Before doing so, it's imperative that you clean your guitar of all sanding residue from the previous grit, and that you change your water. Remember to add the drop(s) of dish detergent.

Continue as above, going through each grit.

You can go through all of the grits in one sitting, or do some sanding, clean the guitar, and continue later. If you split it up, keep track of which grit you're on.


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PostPosted: Fri Oct 25, 2019 12:16 am 
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This might be so obvious that I'm gonna look silly for mentioning it, but...be sure to use 'wet-or-dry' sandpaper.

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peter havriluk


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PostPosted: Fri Oct 25, 2019 7:00 am 
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Joined: Fri Mar 03, 2006 7:09 pm
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Location: Hegins, Pa
One thing to add
I use sanding blocks that I make using pipe foam insulation. Easy cheap and made to fit the application
I use 800 to start getting to about 3/4 through the orange peel
1200 to touch off the bottom of the orange peel and flatten
then 1500 2000
then I go to micro mesh
buff and polish using menzerna med , finish then 175

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John Hall
Blues Creek Guitars Inc
Authorized CF Martin Repair Center
president of Association of Stringed Instrument Artisans
http://www.bluescreekguitars.com


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PostPosted: Fri Oct 25, 2019 7:38 am 
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I'll add something too. When using micromesh, do NOT use them wet. I tried it once and they fell apart and ruined the pads. I just thought I'd mention it.


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PostPosted: Fri Oct 25, 2019 8:45 am 
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Location: Hegins, Pa
I don't use the micro mesh pads I use the sheets and they do a fine job wet.

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John Hall
Blues Creek Guitars Inc
Authorized CF Martin Repair Center
president of Association of Stringed Instrument Artisans
http://www.bluescreekguitars.com


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PostPosted: Fri Oct 25, 2019 10:01 am 
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Joined: Wed Feb 13, 2019 9:52 am
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useful thread, i've been woodworking since i was a kid but learning to polish a guitar this year forced me to re-learn many basics like properly sanding. I think mostly I've learned that there is a lot more to learn. Thanks for these tips!


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PostPosted: Fri Oct 25, 2019 6:56 pm 
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Location: Chestertown Maryland
John

What is 175 ??

Ed


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PostPosted: Fri Oct 25, 2019 7:27 pm 
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Joined: Fri Mar 03, 2006 7:09 pm
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Location: Hegins, Pa
a buffing compound from Menzernna

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John Hall
Blues Creek Guitars Inc
Authorized CF Martin Repair Center
president of Association of Stringed Instrument Artisans
http://www.bluescreekguitars.com


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PostPosted: Tue Oct 29, 2019 1:47 pm 
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Joined: Tue Mar 12, 2013 9:55 am
Posts: 8
Thanks everyone got through all the grits on a rainy Sunday in New York the guitar is certainly smooth. I do have another question about Micro Mesh. In the Stew Mac finishing kit they only included the grits for wet dry 800, 1000, 1200, 1500 and 2000. Above John mentioned the micro mesh after those grits, is this even finer than the included sand paper and is it necessary or can I just go into buffing compounds? The kit includes 3 buffing compounds and then a swirl remover.

Once again thanks for all your advice.
Pat


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